Adjustable stage clamp



G. KELLY. ADJUSTABLE STAGE- CLAMP. APPLICATION FILED MAR. 24, 1921.

Patented Oct. 17, 1922.

INVENTOR. I

A T TORNE Y5.

Patented Get. 17, 1922.

I GEORGE KELLY, or Los ANeELEsoaLIronnrA.

,ADJUSTABLE smemmm.

Application filed March 24, 1921. Serial No. 455,368.

To all who-wait may concern:

Be it known that I GEORGE KELLY, a citizen of the United states, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Adjustable Stage Clamps, of which the following is a specification.

It is the object of this invention to provide a support and adjustable clamping means adapted to be employed in connection with stage sets and the like in order to readily connect the various frames forming the stage setting and then support the same in upright position. The invention will be readily understood. from thefollowing description of the accompanying drawings, in which Figure 1 is a perspective view of one of the improved supporting clamping members showing the method of connecting the same to two adjacent frames of a stage setting.

Fig.2 is a front elevation of the device showing the frame in vertical section.

Fig. 3 is a side elevation of the support of the device partly in vertical section and showing the method of attaching the same to the clamping member of the device.

Fig. 4 is a horizontal section onthe line el4 of Fig. 2.

In the drawings 7 I have shown usual frames forming part of a stage setting,'said frames including side uprights 1 and suit- I able fabric surfaces 2 mounted upon the frames. The improved clamping and supporting mechanism'is adapted to clamp together the side frames 1 of adjacent portions of the set, and to also support the frames as thus clamped together in upright position.

As an instance of this arrangement side plates 3 and 4 are arranged upon opposite outer surfaces of the frames 1 which are to be clamped together, and alined openings 5 and 6 are provided in the side plates and through the frames 1. A bracket arm 7 projects from one of the side plates shown as plate 4:, and said bracket is provided with an elongated slot 8 adapted to receive a pivot bolt 9 having the cam 10 journaled thereon. The cam preferably comprises a forked cam member having the operating handle 11 projecting from the same and adapted to re. ceive a rod. 12 between the forks of the cam and fixed upon pivot bolt 9. This rod extends through the openings 5 and 6 of the side plates and of the frames, and one surface ofthe rod is notched along its length,

as shown at 13, so that adog 14 pivoted to side plate 3,may engage in any one of said notches for 'adjustably positioning the rod with relation to side plate 3. i

By disengaging dog 14- from rod 12, it will 'benoted that the frame carrying side plate 4 may be readily removed from the frame carrying side plate 3, by slipping rod 12 through the alined openings; and when it is desired to clamp the frame together, it is onlynecessary to aline the openings 5 and '6 of the two frames and insert rod v 12 through said openings so that it may be engaged by dog 14;. By then swinging the cam upon its pivot through movement of its operating handle, the cam member will be moved along the length of slot 8 so as to adjust rod 12 with relation to side plate 4 and thereby clamp the two frames together.

The support for the frames as thus connected includes a member pivoted to a bracket which may be secured to the floor, said member being detachably connected to the connected frames at its opposite end as by a pivotally detachable connection.

For this purpose a stud 20 projects from one of the side plates shown as side plate 4, and said stud is provided with a laterally projecting in 21. The support includes an arm 22 havlng an opening 23 adapted to be received over'stud 20. This opening is provided with a radial recess 24 adapted to receive the pin 21 in order that arm 22 may be positioned uponstud 20 beneath locking pin 21. The surface of arm 22 surrounding opening 23 is arranged as a cam surface 25 so that when the arm is swung with relation to the stud in order to move pin 21.0ut of alinement with recess 24 and therefore into position for locking the arm to the stud, the movement of the locking pin over the cam surface 25 will clamp the arm to side plate 4.

The arm 22 is connected to a suitable support 26 which, at its lower end, is provided with side plates 27 preferably extending beyond the end of the support. One of these side plates is preferably provided with a lateral projection 28 received between the two side plates beyond the end of support 26 and having a concave surface 29 at its outer end forming a bearing. The side plates 27 project somewhat beyond the bearing surface 29 and are received against opposite ends of a bearing 30 extending upwardly from a bracket 31 which is adapted to be seposition.

ariouschanges maybe made Without departing fromthe spirit of the" invention as claimed. I H i /Vhat is claimed is: g v 1. In an adjustable stage clamp, the combination'with frames having alined openings, plates secured.v to the outer faces of the frames and having openings. aligning with the open- ,ings-in the, frames, a dog carried by one of said plates, ,a bracket arm extending from the other one of said platesand-provided With an elongated slot,- a bolt slidably mounted in the slot, a forked cam upon the bolt, an operating handle connected to the cam, and a notched rod mounted inthe fork of the cam upon the bolt and adaptedto extend through the openings in the plate and frames and be engaged by'the dog, so that -When--thehandle is elevated and the cam, pressed against the first plate the notched rod will be engagecl;by the dog and then as-the handle is lowered-the cam Will tighten and clampthe. frames together. H

2. In an adjustable stage clamp, a plate,

a stud projecting from the plate, a pin extending laterally from the stud,'and an arm having an opening to receive the stud and a radial recess to receive the pin, there being a-cam'surface around the opening, so that when the arm is applied'and rotated, to bring the pin out of alinement With the radial .rccess the parts Will tighten. I

3. The combinationwith frames, of means fordetachably adjustably clamping said frames, a support rotatably detachably connected at one end to said clamping means, and a bracket having the other end of said support pivotally connected thereto, said bracket being detachably secured to a base.

4. The combination with frames having alinedopenings extending through the same, of a clamping member extending through said openings and connected to one of said frames,means for moving said member relative to the other frame-to clamp said frames, and a support connected to said frames.

5. .The combination with frames having alined openings extending through the same, of a clamping. member extending through said openings, means for adjustably connecting said member to one of said frames, means for moving said member relative to the other connected tosaid frames, t

6. The combmationv with frames having alined openings extending through the same,

frame to clamp said frames, and. a support of a clamping member extending through said openings and connected to one of said frames antoperating cam pivoted-to said frame tomove saidmemberso as to clamp clamping memberandengaging thesecond said frames, and a support connected'to said frames. r 1

support rotatably detachably connected at one end to said frame, said connection in- 7. The combination With La frame, of a cluding a cam surface adapted to draw said support to said frame When in attached position. t :1 1 i 8. The combinationwith a frame, of a support, side plates projectingbeyond said sup port, a lateral spacing member between said side plates beyond said support and forming a bearing, and a bracket havingu-a' bearing member received between said ,side ,plates and againstsaid spacing: member bearing.

nameto, this specification. j

i GEORGE KELLYQ In testimony whereof- I have signed my 

